Improvement in flooring-clamps



J. SOHOPIELD. Flooring Clamp.

No. 201,709 Patented M ar ch 26,1878.

WITNESSES: l IIT i av N-PETERS, PHDTO-LITHOGRAPNER. WASHINGTON, D.

UNITED STATES PATENT OFFICE.

JOHN SOHOFIELD, OF CHEYENNE CITY, WYOMING TERRITORY.

IMPROVEMENT IN FLOORING-CLAMPS.

Specification forming part of Letters Patent No. 201,709, dated March 26, 1878 application filed March 13, 1878. 1

To all whom it may concern:

Be it known that I, JOHN SoHoFIELD, of Cheyenne City, in the county of Laramie and Territory of Wyoming, have invented an Improvement in Flooring-Clamps, of which the following is a specification:

My invention consists. of a sliding presser with a toothed shank and a toothed segmental leverfor working it, mounted on a base-plate to rest on the joist, and having a dog for holding it against sliding backward, making a simple and efficient contrivance, which is also applicable for clamping other work.

Figure l is a sectional elevation of my im proved clamp, taken on the line 00 w of Fig. 2. Fig. 2 is a horizontal section taken on line 3 y of Fig. 1.

Similar letters of reference indicate corresponding parts.

A is a base-plate to rest on the joist B, for holding the sliding clamp O, and the lever D, for working it. On the under side it has adjustable cleats E, for fitting against the sides of joists of different widths, and at the rear it has the dog F, to hold it from sliding back.

The clamp has a toothed shank, G, working in a groove, H, in the base-plate,and the lever has a toothed segment, I, to work the clamp, said lever being pivoted over the shank in cars J of the plate. I

The shank of the clamp also has ratchetnotches K, for a holding-pawl, L, to keep the work uptight until it is secured. The dog F is hinged to the base-plate, and it has an adjusting-screw, N, to regulate the projection below the base-plate, as required for entering 

